1 // Copyright (c) 2009-2010 Satoshi Nakamoto
2 // Copyright (c) 2009-2012 The Bitcoin developers
3 // Distributed under the MIT/X11 software license, see the accompanying
4 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
10 #include <sys/fcntl.h>
18 int fUseProxy = false;
19 CService addrProxy("127.0.0.1",9050);
20 int nConnectTimeout = 5000;
23 static const unsigned char pchIPv4[12] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff };
25 bool static LookupIntern(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions, bool fAllowLookup)
28 struct addrinfo aiHint;
29 memset(&aiHint, 0, sizeof(struct addrinfo));
31 aiHint.ai_socktype = SOCK_STREAM;
32 aiHint.ai_protocol = IPPROTO_TCP;
35 aiHint.ai_family = AF_UNSPEC;
36 aiHint.ai_flags = fAllowLookup ? 0 : AI_NUMERICHOST;
38 aiHint.ai_family = AF_INET;
39 aiHint.ai_flags = fAllowLookup ? 0 : AI_NUMERICHOST;
43 aiHint.ai_family = AF_UNSPEC;
44 aiHint.ai_flags = AI_ADDRCONFIG | (fAllowLookup ? 0 : AI_NUMERICHOST);
46 aiHint.ai_family = AF_INET;
47 aiHint.ai_flags = AI_ADDRCONFIG | (fAllowLookup ? 0 : AI_NUMERICHOST);
50 struct addrinfo *aiRes = NULL;
51 int nErr = getaddrinfo(pszName, NULL, &aiHint, &aiRes);
55 struct addrinfo *aiTrav = aiRes;
56 while (aiTrav != NULL && (nMaxSolutions == 0 || vIP.size() < nMaxSolutions))
58 if (aiTrav->ai_family == AF_INET)
60 assert(aiTrav->ai_addrlen >= sizeof(sockaddr_in));
61 vIP.push_back(CNetAddr(((struct sockaddr_in*)(aiTrav->ai_addr))->sin_addr));
65 if (aiTrav->ai_family == AF_INET6)
67 assert(aiTrav->ai_addrlen >= sizeof(sockaddr_in6));
68 vIP.push_back(CNetAddr(((struct sockaddr_in6*)(aiTrav->ai_addr))->sin6_addr));
72 aiTrav = aiTrav->ai_next;
77 return (vIP.size() > 0);
80 bool LookupHost(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions, bool fAllowLookup)
86 strlcpy(psz, pszName, sizeof(psz));
87 if (psz[0] == '[' && psz[strlen(psz)-1] == ']')
90 psz[strlen(psz)-1] = 0;
93 return LookupIntern(pszHost, vIP, nMaxSolutions, fAllowLookup);
96 bool LookupHostNumeric(const char *pszName, std::vector<CNetAddr>& vIP, unsigned int nMaxSolutions)
98 return LookupHost(pszName, vIP, nMaxSolutions, false);
101 bool Lookup(const char *pszName, std::vector<CService>& vAddr, int portDefault, bool fAllowLookup, unsigned int nMaxSolutions)
105 int port = portDefault;
108 strlcpy(psz, pszName, sizeof(psz));
109 char* pszColon = strrchr(psz+1,':');
110 char *pszPortEnd = NULL;
111 int portParsed = pszColon ? strtoul(pszColon+1, &pszPortEnd, 10) : 0;
112 if (pszColon && pszPortEnd && pszPortEnd[0] == 0)
114 if (psz[0] == '[' && pszColon[-1] == ']')
121 if (port >= 0 && port <= USHRT_MAX)
126 if (psz[0] == '[' && psz[strlen(psz)-1] == ']')
129 psz[strlen(psz)-1] = 0;
134 std::vector<CNetAddr> vIP;
135 bool fRet = LookupIntern(pszHost, vIP, nMaxSolutions, fAllowLookup);
138 vAddr.resize(vIP.size());
139 for (unsigned int i = 0; i < vIP.size(); i++)
140 vAddr[i] = CService(vIP[i], port);
144 bool Lookup(const char *pszName, CService& addr, int portDefault, bool fAllowLookup)
146 std::vector<CService> vService;
147 bool fRet = Lookup(pszName, vService, portDefault, fAllowLookup, 1);
154 bool LookupNumeric(const char *pszName, CService& addr, int portDefault)
156 return Lookup(pszName, addr, portDefault, false);
159 bool ConnectSocket(const CService &addrDest, SOCKET& hSocketRet, int nTimeout)
161 hSocketRet = INVALID_SOCKET;
163 SOCKET hSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
164 if (hSocket == INVALID_SOCKET)
168 setsockopt(hSocket, SOL_SOCKET, SO_NOSIGPIPE, (void*)&set, sizeof(int));
171 bool fProxy = (fUseProxy && addrDest.IsRoutable());
172 struct sockaddr_in sockaddr;
174 addrProxy.GetSockAddr(&sockaddr);
176 addrDest.GetSockAddr(&sockaddr);
179 u_long fNonblock = 1;
180 if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR)
182 int fFlags = fcntl(hSocket, F_GETFL, 0);
183 if (fcntl(hSocket, F_SETFL, fFlags | O_NONBLOCK) == -1)
186 closesocket(hSocket);
191 if (connect(hSocket, (struct sockaddr*)&sockaddr, sizeof(sockaddr)) == SOCKET_ERROR)
193 // WSAEINVAL is here because some legacy version of winsock uses it
194 if (WSAGetLastError() == WSAEINPROGRESS || WSAGetLastError() == WSAEWOULDBLOCK || WSAGetLastError() == WSAEINVAL)
196 struct timeval timeout;
197 timeout.tv_sec = nTimeout / 1000;
198 timeout.tv_usec = (nTimeout % 1000) * 1000;
202 FD_SET(hSocket, &fdset);
203 int nRet = select(hSocket + 1, NULL, &fdset, NULL, &timeout);
206 printf("connection timeout\n");
207 closesocket(hSocket);
210 if (nRet == SOCKET_ERROR)
212 printf("select() for connection failed: %i\n",WSAGetLastError());
213 closesocket(hSocket);
216 socklen_t nRetSize = sizeof(nRet);
218 if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, (char*)(&nRet), &nRetSize) == SOCKET_ERROR)
220 if (getsockopt(hSocket, SOL_SOCKET, SO_ERROR, &nRet, &nRetSize) == SOCKET_ERROR)
223 printf("getsockopt() for connection failed: %i\n",WSAGetLastError());
224 closesocket(hSocket);
229 printf("connect() failed after select(): %s\n",strerror(nRet));
230 closesocket(hSocket);
235 else if (WSAGetLastError() != WSAEISCONN)
240 printf("connect() failed: %i\n",WSAGetLastError());
241 closesocket(hSocket);
246 // this isn't even strictly necessary
247 // CNode::ConnectNode immediately turns the socket back to non-blocking
248 // but we'll turn it back to blocking just in case
251 if (ioctlsocket(hSocket, FIONBIO, &fNonblock) == SOCKET_ERROR)
253 fFlags = fcntl(hSocket, F_GETFL, 0);
254 if (fcntl(hSocket, F_SETFL, fFlags & !O_NONBLOCK) == SOCKET_ERROR)
257 closesocket(hSocket);
263 printf("proxy connecting %s\n", addrDest.ToString().c_str());
264 char pszSocks4IP[] = "\4\1\0\0\0\0\0\0user";
265 struct sockaddr_in addr;
266 addrDest.GetSockAddr(&addr);
267 memcpy(pszSocks4IP + 2, &addr.sin_port, 2);
268 memcpy(pszSocks4IP + 4, &addr.sin_addr, 4);
269 char* pszSocks4 = pszSocks4IP;
270 int nSize = sizeof(pszSocks4IP);
272 int ret = send(hSocket, pszSocks4, nSize, MSG_NOSIGNAL);
275 closesocket(hSocket);
276 return error("Error sending to proxy");
279 if (recv(hSocket, pchRet, 8, 0) != 8)
281 closesocket(hSocket);
282 return error("Error reading proxy response");
284 if (pchRet[1] != 0x5a)
286 closesocket(hSocket);
287 if (pchRet[1] != 0x5b)
288 printf("ERROR: Proxy returned error %d\n", pchRet[1]);
291 printf("proxy connected %s\n", addrDest.ToString().c_str());
294 hSocketRet = hSocket;
298 void CNetAddr::Init()
303 void CNetAddr::SetIP(const CNetAddr& ipIn)
305 memcpy(ip, ipIn.ip, sizeof(ip));
313 CNetAddr::CNetAddr(const struct in_addr& ipv4Addr)
315 memcpy(ip, pchIPv4, 12);
316 memcpy(ip+12, &ipv4Addr, 4);
320 CNetAddr::CNetAddr(const struct in6_addr& ipv6Addr)
322 memcpy(ip, &ipv6Addr, 16);
326 CNetAddr::CNetAddr(const char *pszIp, bool fAllowLookup)
329 std::vector<CNetAddr> vIP;
330 if (LookupHost(pszIp, vIP, 1, fAllowLookup))
334 CNetAddr::CNetAddr(const std::string &strIp, bool fAllowLookup)
337 std::vector<CNetAddr> vIP;
338 if (LookupHost(strIp.c_str(), vIP, 1, fAllowLookup))
342 int CNetAddr::GetByte(int n) const
347 bool CNetAddr::IsIPv4() const
349 return (memcmp(ip, pchIPv4, sizeof(pchIPv4)) == 0);
352 bool CNetAddr::IsRFC1918() const
356 (GetByte(3) == 192 && GetByte(2) == 168) ||
357 (GetByte(3) == 172 && (GetByte(2) >= 16 && GetByte(2) <= 31)));
360 bool CNetAddr::IsRFC3927() const
362 return IsIPv4() && (GetByte(3) == 169 && GetByte(2) == 254);
365 bool CNetAddr::IsRFC3849() const
367 return GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x0D && GetByte(12) == 0xB8;
370 bool CNetAddr::IsRFC3964() const
372 return (GetByte(15) == 0x20 && GetByte(14) == 0x02);
375 bool CNetAddr::IsRFC6052() const
377 static const unsigned char pchRFC6052[] = {0,0x64,0xFF,0x9B,0,0,0,0,0,0,0,0};
378 return (memcmp(ip, pchRFC6052, sizeof(pchRFC6052)) == 0);
381 bool CNetAddr::IsRFC4380() const
383 return (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0 && GetByte(12) == 0);
386 bool CNetAddr::IsRFC4862() const
388 static const unsigned char pchRFC4862[] = {0xFE,0x80,0,0,0,0,0,0};
389 return (memcmp(ip, pchRFC4862, sizeof(pchRFC4862)) == 0);
392 bool CNetAddr::IsRFC4193() const
394 return ((GetByte(15) & 0xFE) == 0xFC);
397 bool CNetAddr::IsRFC6145() const
399 static const unsigned char pchRFC6145[] = {0,0,0,0,0,0,0,0,0xFF,0xFF,0,0};
400 return (memcmp(ip, pchRFC6145, sizeof(pchRFC6145)) == 0);
403 bool CNetAddr::IsRFC4843() const
405 return (GetByte(15) == 0x20 && GetByte(14) == 0x01 && GetByte(13) == 0x00 && (GetByte(12) & 0xF0) == 0x10);
408 bool CNetAddr::IsLocal() const
411 if (IsIPv4() && (GetByte(3) == 127 || GetByte(3) == 0))
414 // IPv6 loopback (::1/128)
415 static const unsigned char pchLocal[16] = {0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1};
416 if (memcmp(ip, pchLocal, 16) == 0)
422 bool CNetAddr::IsMulticast() const
424 return (IsIPv4() && (GetByte(3) & 0xF0) == 0xE0)
425 || (GetByte(15) == 0xFF);
428 bool CNetAddr::IsValid() const
430 // Clean up 3-byte shifted addresses caused by garbage in size field
431 // of addr messages from versions before 0.2.9 checksum.
432 // Two consecutive addr messages look like this:
433 // header20 vectorlen3 addr26 addr26 addr26 header20 vectorlen3 addr26 addr26 addr26...
434 // so if the first length field is garbled, it reads the second batch
435 // of addr misaligned by 3 bytes.
436 if (memcmp(ip, pchIPv4+3, sizeof(pchIPv4)-3) == 0)
439 // unspecified IPv6 address (::/128)
440 unsigned char ipNone[16] = {};
441 if (memcmp(ip, ipNone, 16) == 0)
444 // documentation IPv6 address
451 uint32_t ipNone = INADDR_NONE;
452 if (memcmp(ip+12, &ipNone, 4) == 0)
457 if (memcmp(ip+12, &ipNone, 4) == 0)
464 bool CNetAddr::IsRoutable() const
466 return IsValid() && !(IsRFC1918() || IsRFC3927() || IsRFC4862() || IsRFC4193() || IsRFC4843() || IsLocal());
469 std::string CNetAddr::ToStringIP() const
472 return strprintf("%u.%u.%u.%u", GetByte(3), GetByte(2), GetByte(1), GetByte(0));
474 return strprintf("%x:%x:%x:%x:%x:%x:%x:%x",
475 GetByte(15) << 8 | GetByte(14), GetByte(13) << 8 | GetByte(12),
476 GetByte(11) << 8 | GetByte(10), GetByte(9) << 8 | GetByte(8),
477 GetByte(7) << 8 | GetByte(6), GetByte(5) << 8 | GetByte(4),
478 GetByte(3) << 8 | GetByte(2), GetByte(1) << 8 | GetByte(0));
481 std::string CNetAddr::ToString() const
486 bool operator==(const CNetAddr& a, const CNetAddr& b)
488 return (memcmp(a.ip, b.ip, 16) == 0);
491 bool operator!=(const CNetAddr& a, const CNetAddr& b)
493 return (memcmp(a.ip, b.ip, 16) != 0);
496 bool operator<(const CNetAddr& a, const CNetAddr& b)
498 return (memcmp(a.ip, b.ip, 16) < 0);
501 bool CNetAddr::GetInAddr(struct in_addr* pipv4Addr) const
505 memcpy(pipv4Addr, ip+12, 4);
510 bool CNetAddr::GetIn6Addr(struct in6_addr* pipv6Addr) const
512 memcpy(pipv6Addr, ip, 16);
517 // get canonical identifier of an address' group
518 // no two connections will be attempted to addresses with the same group
519 std::vector<unsigned char> CNetAddr::GetGroup() const
521 std::vector<unsigned char> vchRet;
522 int nClass = 0; // 0=IPv6, 1=IPv4, 254=local, 255=unroutable
526 // all local addresses belong to the same group
533 // all unroutable addresses belong to the same group
539 // for IPv4 addresses, '1' + the 16 higher-order bits of the IP
540 // includes mapped IPv4, SIIT translated IPv4, and the well-known prefix
541 else if (IsIPv4() || IsRFC6145() || IsRFC6052())
546 // for 6to4 tunneled addresses, use the encapsulated IPv4 address
547 else if (IsRFC3964())
552 // for Teredo-tunneled IPv6 addresses, use the encapsulated IPv4 address
553 else if (IsRFC4380())
556 vchRet.push_back(GetByte(3) ^ 0xFF);
557 vchRet.push_back(GetByte(2) ^ 0xFF);
560 // for he.net, use /36 groups
561 else if (GetByte(15) == 0x20 && GetByte(14) == 0x11 && GetByte(13) == 0x04 && GetByte(12) == 0x70)
563 // for the rest of the IPv6 network, use /32 groups
567 vchRet.push_back(nClass);
570 vchRet.push_back(GetByte(15 - nStartByte));
575 vchRet.push_back(GetByte(15 - nStartByte) | ((1 << nBits) - 1));
580 int64 CNetAddr::GetHash() const
582 uint256 hash = Hash(&ip[0], &ip[16]);
584 memcpy(&nRet, &hash, sizeof(nRet));
588 void CNetAddr::print() const
590 printf("CNetAddr(%s)\n", ToString().c_str());
593 void CService::Init()
603 CService::CService(const CNetAddr& cip, unsigned short portIn) : CNetAddr(cip), port(portIn)
607 CService::CService(const struct in_addr& ipv4Addr, unsigned short portIn) : CNetAddr(ipv4Addr), port(portIn)
612 CService::CService(const struct in6_addr& ipv6Addr, unsigned short portIn) : CNetAddr(ipv6Addr), port(portIn)
617 CService::CService(const struct sockaddr_in& addr) : CNetAddr(addr.sin_addr), port(ntohs(addr.sin_port))
619 assert(addr.sin_family == AF_INET);
623 CService::CService(const struct sockaddr_in6 &addr) : CNetAddr(addr.sin6_addr), port(ntohs(addr.sin6_port))
625 assert(addr.sin6_family == AF_INET6);
629 CService::CService(const char *pszIpPort, bool fAllowLookup)
633 if (Lookup(pszIpPort, ip, 0, fAllowLookup))
637 CService::CService(const char *pszIpPort, int portDefault, bool fAllowLookup)
641 if (Lookup(pszIpPort, ip, portDefault, fAllowLookup))
645 CService::CService(const std::string &strIpPort, bool fAllowLookup)
649 if (Lookup(strIpPort.c_str(), ip, 0, fAllowLookup))
653 CService::CService(const std::string &strIpPort, int portDefault, bool fAllowLookup)
657 if (Lookup(strIpPort.c_str(), ip, portDefault, fAllowLookup))
661 unsigned short CService::GetPort() const
666 bool operator==(const CService& a, const CService& b)
668 return (CNetAddr)a == (CNetAddr)b && a.port == b.port;
671 bool operator!=(const CService& a, const CService& b)
673 return (CNetAddr)a != (CNetAddr)b || a.port != b.port;
676 bool operator<(const CService& a, const CService& b)
678 return (CNetAddr)a < (CNetAddr)b || ((CNetAddr)a == (CNetAddr)b && a.port < b.port);
681 bool CService::GetSockAddr(struct sockaddr_in* paddr) const
685 memset(paddr, 0, sizeof(struct sockaddr_in));
686 if (!GetInAddr(&paddr->sin_addr))
688 paddr->sin_family = AF_INET;
689 paddr->sin_port = htons(port);
694 bool CService::GetSockAddr6(struct sockaddr_in6* paddr) const
696 memset(paddr, 0, sizeof(struct sockaddr_in6));
697 if (!GetIn6Addr(&paddr->sin6_addr))
699 paddr->sin6_family = AF_INET6;
700 paddr->sin6_port = htons(port);
705 std::vector<unsigned char> CService::GetKey() const
707 std::vector<unsigned char> vKey;
709 memcpy(&vKey[0], ip, 16);
710 vKey[16] = port / 0x100;
711 vKey[17] = port & 0x0FF;
715 std::string CService::ToStringPort() const
717 return strprintf(":%i", port);
720 std::string CService::ToStringIPPort() const
722 return ToStringIP() + ToStringPort();
725 std::string CService::ToString() const
727 return ToStringIPPort();
730 void CService::print() const
732 printf("CService(%s)\n", ToString().c_str());
735 void CService::SetPort(unsigned short portIn)